Log Message:
claws-mail: Update to 3.17.4

* 3.17.4
--------

* New HTML viewer plugin: Litehtml viewer

* Added option 'Enable keyboard shortcuts' to the 'Keyboard
  shortcuts' frame on /Configuration/Preferences/Other/Miscellaneous

* Compose: implemented copying of attached images to clipboard

* Compose: images and text/uri-list (files) can now be attached by
  pasting into the Compose window

* Python plugin: window sizes are now remembered for the Python
  console, the 'Open URLs' and the 'Set mailbox order' windows.

* Fancy plugin: the download-link feature now follows redirections

* MBOX export: the Enter key in the dialogue now starts the export

* The date (ISO format) has been added to log timestamps

* Updated translations: Brazilian Portuguese, Catalan, Czech, Danish,
  Dutch, French, German, Hungarian, Indonesian, Polish, Portuguese,
  Romanian, Russian, Slovak, Spanish, Swedish, Traditional Chinese,
  Turkish

* bug fixes:
	o bug 1920, 'No automatic NNTP filtering'
	o bug 2045, 'address book blocks focus on email window'
	o bug 2131, 'Focus stealing after mail check'
	o bug 2627, 'Filtering does not work on NNTP'
	o bug 3070, 'misbehaving text wrapping when URL chars are
		     present'
	o bug 3838, 'Canceled right-click on message list leaves UI
		     in inconsistent state'
	o bug 3977, 'Fix crashes when some external APIs fail'
	o bug 3979, 'Hang (with killing needed) during action which
		     extracts attachments'
	o bug 4029, 'segfault after deleting message in a window'
	o bug 4031, 'fingerprint in SSL/TLS certificates for ...
		     (regress error)'
	o bug 4037, 'Fix some small issues'
	o bug 4142, 'Translation error on Russian'
	o bug 4145, 'proxy server for sending doesn't work'
	o bug 4155, 'remember directory of last saving'
	o bug 4166, 'corrupted double-linked list'
	0 bug 4167, 'Max line length exceeded when forwarding mail'
	o bug 4188, 'STL file is sent not as an attachment but as its
		     base64 representation in plaintext'
	o CID 1442278, 'impossible to trigger buffer overflow'
	o Make key accelerators from menu work in addressbook window
	o save checkbox choices of display/summaries/defaults prefs
	o Do not throw an error when cancelling 'Save email as...'.
	o occasional crash on drag'n'drop of msgs
	o possible stack overflow in vcalendar's Curl data handler
	o crash when LDAP address source is defined in index, but
	  LDAP support is disabled
	o crash in Fancy plugin if one of the MIME parts has no
	  Content-ID
	o a few small memory leaks in scan_mailto_url()
	o configure script for rare cases where python is not
	  installed
	o incorrect charset conversion in sc_html_read_line().
	o markup in 'key not fully trusted' warning in pgpcore
	o use after free in rare code path in rssyl_subscribe()
	o several memory leaks
	o verify_folderlist_xml() for fresh starts
	o printf formats for size_t and goffset arguments.
	o alertpanel API use in win32 part of mimeview.c
	o pid handling in debug output of kill_children_cb()
	o incorrect pointer arithmetic in w32_filesel.c

* 3.17.3
--------

* Add support for TLS Server Name Indication (SNI). This enables the
  sending of your hostname, if available, to the server so that it
  can select the appropriate certificate for your domain. This is
  useful for servers which host multiple domains on the same IP
  address.
  This is a hidden Account preference, 'use_tls_sni', and is enabled
  by default.

* SSL/TLS certificate manager: The Delete key will now delete the
  selected certificate.

* Window sizes are now remembered for the 'Apply tags' and SSL/TLS
  certificate manager windows.

* bug fixes:
	o bug 3519, 'Links including umlauts are broken'
	o bug 4134, ''Save message to' option not set when it should
		     be'
	o prevent the Tools/SSL/TLS Certificates dialogue from
	  crashing when certificate filenames contain a fingerprint.
	o build on GNU Hurd.
	o various build fixes when building without GnuTLS.

* 3.17.2
--------

* Message List: A context menu has been added to the column headers,
  it has two entries: a new option, 'Lock column headers', and 'Set
  displayed colums'.

* Folder List:  A context menu has been added to the column headers,
  containing 'Set displayed columns'.

* Preferences: The Display/Summaries option page has been split into
  three notebook pages: Folder List, Message List, and Defaults.
  The Message List page contains the new 'Lock column headers'
  option. The Defaults page contains several new options for new
  folders.

* New Folder Properties: It is now possible to control signing and
  encrypting options on the Compose page. By default it follows the
  Account preferences, but they can be overridden to always sign
  and/or encrypt, or never sign/encrypt.

* Saving sent messages: The global preference, 'Save sent messages',
  can now be overriden by the Folder Property and Account
  preferences. The global preference no longer needs to be activated
  for the Account Preference, 'Put sent messages in ...' option to
  function. Likewise, the Folder Property, 'Save copy of outgoing
  messages to this folder instead of Sent', no longer relies on the
  global preference being set.

* SSL/TLS certificates: The SHA-256 fingerprint is now displayed, and
  the MD5 fingerprint has been removed.

* SSL/TLS certificates list: Status and Expiry columns have been
  added, and expired and invalid certificates are now clearly
  indicated.

* QuickSearch: body searches are now quicker.

* QuickSearch: symbols used in Extended searches are now expanded
  in the 'Edit' dialogue.

* Re-editing: Flags and tags are now preserved when re-editing a
  message.

* Fancy plugin: The minimum required webkitgtk version is now 1.10.0.

* PDF Viewer plugin: Ctrl+scroll now zooms.

* Tools: added cm-break.pl script, which breaks thread references for
  the selected messages; textviewer.pl has been updated and now
  requires perl 5.14.1.

* The legacy "sylpheed-claws" symlink is no longer installed in the
  bindir.

* New translation: Portuguese.

* Updated translations: Brazilian Portuguese, Catalan, Czech, Danish,
  Dutch, French, German, Russian, Slovak, Spanish, Swedish, Turkish.

* bug fixes:
	o bug 3418, 'Building on a Cross Compiling toolchain doesn't
		     work'
	o bug 3889, 'Address and quoted message inconsistent in
		     reply'
	o bug 4114, 'autogen.sh: Fix argument quoting'
	o bug 4115, 'autogen: avoid unwarranted re-configure'
	o bug 4120, 'New cert files are created in $HOME instead of
		     in ~/.claws-mail/certs'
	o byg 4121, 'Moving a subfolder in another folder erases its
		     processing rules' (sic)
	o bug 4132, '"Mark all as (un)read" dialog appears when
		     acting on 1 message only'
	o bug 4133, 'trying to read message from an NNTP group (with
		     all expired articles.'
	o regression where mail was not being checked at startup when
	  it should have been
	o links not being opened in browser when Fancy menu is opened
	  with a keyboard
	o show correct address:port in SOCKS5 proxy connection failure
	  message
	o prevent unexpected loss of drafted message
	o Quicksearch eating keypresses it didn't handle
	o build on Debian 7
	o build on FreeBSD, sys/wait.h is needed for WEXITSTATUS
	  macro
	o Reply from mainwindow menu and toolbar when mainwindow's
	  messageview is hidden
	o CID 1438531 Fix wrong test leading to dead code
	o CID 1439871 and validate Unicode char strictly
	o CID 1439996 and remove unnecessary comparison
	o Fancy: left-click on links not opening in browser
	o RSSyl: lost processing rules when renaming folder
	o annoyance where your current reading is disturbed when a
	  new msg is filtered into the current folder
	o don't leave the user in limbo when privacy system is 'none'
	  and auto signing/encrypting is set
	o several memory leaks